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<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
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<body>

<div class="container">
  <h1>我的第一个 Bootstrap 页面</h1>
  <p>这是一些文本。</p>
</div>

</body>
</html>